Physics, asked by kartiksingh9854, 11 months ago

how work become negative

Answers

Answered by Anonymous

1

Answer:

work becomes negative when the angle between the applied force and direction of movement are in opposite directions......eg. friction

we know

Work = f × s × cos(theta)

now if force and displacement are in opp. dirctions, angle between them is 180°.....and cos180 is -1

so

work = f × s × cos180

f × s × (-1)

-f•s

thus giving you negative work

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